Genesis 24:2-4

2So Abraham said to the oldest servant of his house, who ruled over all that he had, “Please, put your hand under my thigh,

3and I will make you swear by the Lord, the God of heaven and the God of the earth, that you will not take a wife for my son from the daughters of the Canaanites, among whom I dwell;

4but you shall go to my country and to my family, and take a wife for my son Isaac.”